单选题
单选题 How does the instructor organize the information that she presents?
  • A. She explains the scientific method of classifying leaves.
  • B. She discusses the annual growth of a wildflower's leaves.
  • C. She compares leaf arrangements of flowers, shrubs, and trees.
  • D. She describes each leaf arrangement and gives an example.
【正确答案】 D
【答案解析】[解析] 5-7 There are several common leaf arrangements in wildflowers. In the usual arrangement, the one called alternate, each leaf is attached at a different level on the stem. This poppy is a good example. See how ... uh ... there's a leaf here, on the right side, and above that a leaf on the left here, and above that, one on the right again ... and so on, alternating right and left, all the way up the stem. Another type is the opposite arrangement. Notice the difference between the alternate leaves on the poppy and the opposite leaves on this bee plant. The bee plant's leaves are paired on opposite sides of the stem. See how they're attached at the same level of the stem, but on opposite sides. And here we have yet another kind. This one's called basal, and our example is the amaryllis. Notice how all the leaves are at ground level, at the stem's base. The amaryllis ... this particular plant, and all other members of the amaryllis family ... uh ... it has narrow basal leaves and a long, leafless stalk. I have some lovely samples to share with you today. I'd like you all to come up and examine the contents of... uh ... these two tables. Many of them are specimens of the sunflower family, which includes several species with alternate and opposite leaves. Take a good look and see if you can identify the three types of arrangements. It's okay to handle ... but let me ask you to please handle with care, as some of them are quite delicate. 5. How does the instructor organize the information that she presents? The instructor mainly describes each leaf arrangement and gives an example. She says: ...the one called alternate, each leaf is attached at a different level on the stem. This poppy is a good example; Another type is the opposite arrangement; The bee plant's leaves are paired on opposite sides of the stem; This one 's called basal and our example is the amaryllis.
多选题 Based on the information in the talk, indicate whether each sentence below describes the alternate, opposite, or basal leaf arrangement.
For each sentence, click in the correct box.

This question is worth 2 points.
Alternate Opposite
The plant's leaves
are paired on the
opposite sides of
the stem.
All of the plant's leaves
are at ground level.
Each leaf is attached
at a different level
on the stem.
The leaves are
attached at the same
level on the stem, but
on different sides.
【正确答案】 A
【答案解析】[解析] Based on the information in the talk, indicate whether each sentence below describes the alternate, opposite, or basal leaf arrangement. Opposite: The plant's leaves are paired on the opposite sides of the stem: The bee plant's leaves are paired on opposite sides of the stem. Basal: All of the plant's leaves are at ground level: Notice how all the leaves are at ground level, at the stem 's base. Altemate: Each leaf is attached at a different level on the stem: ... the one called alternate, each leaf is attached at a different level on the stem. Opposite: The leaves are attached at the same level on the stem, but on different sides: ...they're attached at the same level of the stem, but on opposite sides.
单选题 What will the students probably do next?
  • A. Bring flowers to class
  • B. Look at flower samples
  • C. Count a flower's leaves
  • D. Draw pictures of flowers
【正确答案】 B
【答案解析】[解析] What will the students probably do next? The instructor says: I have some lovely samples to share with you today. I'd like you all to come up and examine the contents of.. these two tables.Many of them are specimens of the sunflower family You can predict that the students will look at flower samples.